Browser Threats: OtterCookie Targets Cookies, Raccoon Stealer Adds Firefox Support

Raccoon Stealer v2 Expands to Target Firefox Browser Profiles

• Raccoon Stealer v2, an information-stealing malware, has updated its capabilities to specifically target user profiles within the Firefox web browser.
• This expansion allows the stealer to exfiltrate sensitive data, including cookies, login credentials, and autofill information, stored by Firefox users.
• The malware's evolution emphasizes the continuous threat of infostealers adapting to compromise widely used browsers and exfiltrate user data.

Source: Security Affairs | Date: November 25, 2025

Contagious Interview Campaign Leverages npm Packages to Deploy OtterCookie Malware

• The "Contagious Interview" campaign is a supply chain attack distributing new OtterCookie malware via 197 malicious npm packages.
• OtterCookie malware specifically targets and steals browser cookies, login credentials, and other sensitive data from compromised systems.
• This campaign highlights the risk of malicious packages in software supply chains leading to direct browser data exfiltration and credential theft.

Source: Security Affairs | Date: November 25, 2025

References

1. Security Affairs newsletter Round 552 by Pierluigi Paganini – INTERNATIONAL EDITION - Security Affairs
2. Contagious Interview campaign expands with 197 npm Ppackages spreading new OtterCookie malware - Security Affairs